To cite package ‘unix’ in publications use:

  Ooms J (2024). _unix: POSIX System Utilities_. R package version
  1.5.9, <https://CRAN.R-project.org/package=unix>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {unix: POSIX System Utilities},
    author = {Jeroen Ooms},
    year = {2024},
    note = {R package version 1.5.9},
    url = {https://CRAN.R-project.org/package=unix},
  }